{"id":"CVE-2026-119764","state":"PUBLISHED","title":"Mythic 3.2.16 through 3.4.0.61 Stored XSS via Agent-Downloaded File Preview","description":"Mythic 3.2.16 through 3.4.0.61 contains a stored cross-site scripting vulnerability that allows attackers controlling target endpoint files to run JavaScript in the Mythic UI origin by planting HTML in .pdf-named files. When an operator downloads the file and clicks Preview Media, content-sniffed HTML from /direct/view renders same-origin, stealing localStorage JWTs for full GraphQL and REST access.","publishedAt":"2026-10-30T17:19:55.892Z","updatedAt":"2026-10-30T17:19:55.892Z","severity":{"score":7.4,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["its-a-feature Mythic"],"affected":[{"vendor":"its-a-feature","product":"Mythic","packageURL":"pkg:github/its-a-feature/Mythic","defaultStatus":"unaffected","versions":[{"version":"3.2.16","status":"affected","lessThanOrEqual":"3.4.0.61","versionType":"custom"}],"repo":"https://github.com/its-a-feature/Mythic"}],"references":["https://github.com/h00die/mythic_xss","https://github.com/its-a-feature/Mythic/commit/f06b3ed2d1de6577744cc0b3146966c625685859","https://github.com/its-a-feature/Mythic/blob/33a46d7db7e237458d7e20e7d3cfefef8112e590/MythicReactUI/src/components/pages/Callbacks/ResponseDisplayMedia.js#L335-L336","https://github.com/its-a-feature/Mythic","https://www.vulncheck.com/advisories/mythic-3.2.16-through-3.4.0.61-stored-xss-via-agent-downloaded-file-preview"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-30T17:28:06.624Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/119xxx/CVE-2026-119764.json","commit":"3341b8c15da9d44519feb86e18f02f360209d08a","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-119764","state":"PUBLISHED","datePublished":"2026-10-30T17:19:55.892Z","dateUpdated":"2026-10-30T17:19:55.892Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-30T15:36:24.107Z"},"containers":{"cna":{"title":"Mythic 3.2.16 through 3.4.0.61 Stored XSS via Agent-Downloaded File Preview","descriptions":[{"lang":"en","value":"Mythic 3.2.16 through 3.4.0.61 contains a stored cross-site scripting vulnerability that allows attackers controlling target endpoint files to run JavaScript in the Mythic UI origin by planting HTML in .pdf-named files. 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